From the web page it looks like this is a card that goes into the
computer system. That's not very useful for enterprise applications,
as they are going to want to use an external array that can be used
by a redundant pair of servers.
The DDRdrive X1 does utilize a
From the web page it looks like this is a card that goes into the computer
system. That's not very useful for enterprise applications, as they are going
to want to use an external array that can be used by a redundant pair of
servers.
I'm very interested in a cost-effective device that will
On Mon, Jan 18, 2010 at 8:48 PM, Charles Hedrick hedr...@rutgers.eduwrote:
From the web page it looks like this is a card that goes into the computer
system. That's not very useful for enterprise applications, as they are
going to want to use an external array that can be used by a redundant
On Thu, Jan 14, 2010 at 5:07 PM, Christopher George
cgeo...@ddrdrive.com wrote:
Why not enlighten EMC/NTAP on this then?
On the basic chemistry and possible failure characteristics of Li-Ion
batteries?
I will agree, if I had system level control as in either example, one could
definitely
On 1/13/10 9:51 AM, Christopher George wrote:
The DDRdrive X1 OpenSolaris device driver is now complete,
please join us in our first-ever ZFS Intent Log (ZIL) beta test
program. A select number of X1s are available for loan,
preferred candidates would have a validation background
and/or a true
On Fri, Jan 15, 2010 at 2:07 AM, Christopher George
cgeo...@ddrdrive.com wrote:
Why not enlighten EMC/NTAP on this then?
On the basic chemistry and possible failure characteristics of Li-Ion
batteries?
I will agree, if I had system level control as in either example, one could
definitely
I'm not sure about others on the list, but I have a dislike of AC power
bricks in my racks.
I definitely empathize with your position concerning AC power bricks, but
until the perfect battery is created, and we are far from it, it comes down to
tradeoffs. I personally believe the ignition
On Thu, Jan 14, 2010 at 12:35:32AM -0800, Christopher George wrote:
I'm not sure about others on the list, but I have a dislike of AC power
bricks in my racks.
I definitely empathize with your position concerning AC power bricks, but
until the perfect battery is created, and we are far
On Thu, Jan 14, 2010 at 11:35 AM, Christopher George
cgeo...@ddrdrive.com wrote:
I'm not sure about others on the list, but I have a dislike of AC power
bricks in my racks.
I definitely empathize with your position concerning AC power bricks, but
until the perfect battery is created, and we
On Thu, 14 Jan 2010, Ray Van Dolson wrote:
My gut tells me the risk of this is pretty low and most are going to
prefer the convenience of an onboard BBU to installing UPS'es in all
their racks (as good a practice as that may be).
Other than the spontaneous combustion issue (which was heavily
Is there any data out there that have tracked these sort of ignition
incidents? I have to admit I'd never heard of this. We have quite a
few BBU backed RAID controllers in our servers and I've never had
anything remotely like this occur. I know anecdotal evidence is
meaningless, but this
That's kind of an overstatement. NVRAM backed by on-board LI-Ion
batteries has been used in storage industry for years;
Respectfully, I stand by my three points of Li-Ion batteries as they relate
to enterprise class NVRAM: ignition risk, thermal wear-out, and
proprietary design. As a prior
cg == Christopher George cgeo...@ddrdrive.com writes:
cg I agree, it would be very informative if RAID HBA vendors
cg would publish failure statistics of their Li-Ion based BBU
cg products.
If they haven't, then on what are you basing your decision *not* to
use one? Just the random
On Thu, Jan 14, 2010 at 10:02 PM, Christopher George
cgeo...@ddrdrive.com wrote:
That's kind of an overstatement. NVRAM backed by on-board LI-Ion
batteries has been used in storage industry for years;
Respectfully, I stand by my three points of Li-Ion batteries as they relate
to enterprise
On Thu, January 14, 2010 14:34, Miles Nordin wrote:
cg == Christopher George cgeo...@ddrdrive.com writes:
cg inflexible proprietary nature of Li-Ion
You can get complete systems with charging microcontroller and battery
without any undue encumbrances I can detect on sparkfun.com.
Why not enlighten EMC/NTAP on this then?
On the basic chemistry and possible failure characteristics of Li-Ion
batteries?
I will agree, if I had system level control as in either example, one could
definitely help mitigate said risks compared to selling a card based
product where I have very
On Jan 14, 2010, at 11:02 AM, Christopher George wrote:
That's kind of an overstatement. NVRAM backed by on-board LI-Ion
batteries has been used in storage industry for years;
Respectfully, I stand by my three points of Li-Ion batteries as they relate
to enterprise class NVRAM: ignition
Very interesting product indeed!
Given the volume one of these cards take up inside the server though,
I couldn't help but think that 4GB is a bit on the low side.
Alex.
On Wed, Jan 13, 2010 at 5:51 PM, Christopher George
cgeo...@ddrdrive.com wrote:
The DDRdrive X1 OpenSolaris device driver
On Thu, Jan 14, 2010 at 5:22 PM, Richard Elling richard.ell...@gmail.comwrote:
On Jan 14, 2010, at 11:02 AM, Christopher George wrote:
That's kind of an overstatement. NVRAM backed by on-board LI-Ion
batteries has been used in storage industry for years;
Respectfully, I stand by my
I see nothing in the design that precludes a customer from using a
Li-Ion battery, if they so desire. Perhaps the collective has forgotten
that DC power is one of the simplest and most widespread interfaces
around? :-)
Richard,
Very good point! We have already had a request for the DC jack
Personally I'd say it's a must. Most DC's I operate in wouldn't tolerate
having a card separately wired from the chassis power.
May I ask the list, if this is a hard requirement for anyone else?
Please email me directly cgeorge at ddrdrive dot com.
Thank you,
Christopher George
Founder/CTO
The DDRdrive X1 OpenSolaris device driver is now complete,
please join us in our first-ever ZFS Intent Log (ZIL) beta test
program. A select number of X1s are available for loan,
preferred candidates would have a validation background
and/or a true passion for torturing new hardware/driver :-)
Hey Chris,
The DDRdrive X1 OpenSolaris device driver is now complete,
please join us in our first-ever ZFS Intent Log (ZIL) beta test
program. A select number of X1s are available for loan,
preferred candidates would have a validation background
and/or a true passion for torturing new
Hi Adam,
So was FW aware of this or in contact with these guys?
Also are you requesting/ordering any of these cards to evaluate?
The device seems kind of small at 4GB, and uses a double wide PCI Express slot.
Neil.
On 01/13/10 12:27, Adam Leventhal wrote:
Hey Chris,
The DDRdrive X1
That's very interesting tech you've got there... :-) I have a couple of
questions, with apologies in advance if I missed them on the website..
I see the PCI card has an external power connector - can you explain
how/why that's required, as opposed to using an on card battery or
similar. What
Excellent questions!
I see the PCI card has an external power connector - can you explain
how/why that's required, as opposed to using an on card battery or
similar.
DDRdrive X1 ZIL functionality is best served with an external attached UPS,
this allows the X1 to perform as a non-volatile
cg == Christopher George cgeo...@ddrdrive.com writes:
cg Nothing, the DDRdrive X1's data integrity is guaranteed by the
cg attached UPS.
I've found UPS power is less reliable than unprotected line power
where I live, especially when using bargain UPS's like the ones you
suggest. I've
Thanks for the detailed response - further questions inline...
Christopher George wrote:
Excellent questions!
I see the PCI card has an external power connector - can you explain
how/why that's required, as opposed to using an on card battery or
similar.
DDRdrive X1 ZIL
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